A newer version of Rapid-Pi is available.Or, Learn More About Rapid-Pi
Full user review
Interface great for constructing equations. Symbols and letters organized by tabs so they are easy to find. For the most part, I found it easy to use from the startup without having to search the help section too much.
A major flaw: equations integrated into Word documents will not print correctly. In some cases, symbols replace numbers but most of the time a black-lined bar was printed over the equation. Tried printing on several different printers but still would not print correctly. Tried switching computers a few times but nothing helped. Shame too because the program itself was great. But it does not integrate into Word as well as promised.